/**
* Creates a swing applet instance.
*
* <p>This constructor sets the component's locale property to the value returned by <code>
* JComponent.getDefaultLocale</code>.
*
* @exception HeadlessException if GraphicsEnvironment.isHeadless() returns true.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JApplet() throws HeadlessException {
super();
// Check the timerQ and restart if necessary.
TimerQueue q = TimerQueue.sharedInstance();
if (q != null) {
q.startIfNeeded();
}
/* Workaround for bug 4155072. The shared double buffer image
* may hang on to a reference to this applet; unfortunately
* Image.getGraphics() will continue to call JApplet.getForeground()
* and getBackground() even after this applet has been destroyed.
* So we ensure that these properties are non-null here.
*/
setForeground(Color.black);
setBackground(Color.white);
setLocale(JComponent.getDefaultLocale());
setLayout(new BorderLayout());
setRootPane(createRootPane());
setRootPaneCheckingEnabled(true);
setFocusTraversalPolicyProvider(true);
sun.awt.SunToolkit.checkAndSetPolicy(this);
enableEvents(AWTEvent.KEY_EVENT_MASK);
}
/**
* Creates a swing applet instance.
*
* <p>This constructor sets the component's locale property to the value returned by <code>
* JComponent.getDefaultLocale</code>.
*
* @exception HeadlessException if GraphicsEnvironment.isHeadless() returns true.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JApplet() throws HeadlessException {
super();
// Check the timerQ and restart if necessary.
TimerQueue q = TimerQueue.sharedInstance();
if (q != null) {
synchronized (q) {
if (!q.running) q.start();
}
}
/* Workaround for bug 4155072. The shared double buffer image
* may hang on to a reference to this applet; unfortunately
* Image.getGraphics() will continue to call JApplet.getForeground()
* and getBackground() even after this applet has been destroyed.
* So we ensure that these properties are non-null here.
*/
setForeground(Color.black);
setBackground(Color.white);
setLocale(JComponent.getDefaultLocale());
setLayout(new BorderLayout());
setRootPane(createRootPane());
setRootPaneCheckingEnabled(true);
// This code should be changed after the RFE 4719336 is resolved
// to not make the applet a FocusCycleRoot, but set it's
// FocusTraversalPolicy only.
setFocusCycleRoot(true);
setFocusTraversalPolicy(
KeyboardFocusManager.getCurrentKeyboardFocusManager().getDefaultFocusTraversalPolicy());
enableEvents(AWTEvent.KEY_EVENT_MASK);
}
/** Step simulated time base by n ticks */
public static void step(long n) {
if (!isSimulated) {
throw new IllegalStateException("Can't step TimeBase when in real mode");
}
simulatedTime += n;
// ensure that all timer queue events whose time has come get executed
// before this returns
TimerQueue.runAllExpired();
}
